Hey, losing to the city of Los Angeles' 'B' team w/o the services of our team's leading scorer/captain/former finals MVP by only two points is nothing compared to a healthy Lakers squad getting blown-out by the Cavaliers.
What is interesting to note is that last season, after we lost the Christmas game to the Lakers we went into sort of a slump and eventually slipped from first place in the Eastern Conference standings, while Kevin Garnett went down with an injury. I think it is safe to say that it is definitely more important to remain healthy until the end of the season than to fret over losing a close one here and there.
Btw I thought the Celtics played great against the Magic on Christmas...